John e



(No Model.)

J. R. REYNOLDS.

TAKE-UP FOR BOOK SEWING MACHINES.

No. 358,572. Patented M 1, 1887.

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STATES FFlCt PATENT JOHN R. REYNOLDS, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE SMYTH MANUFACTURING COMPANY, OF SAME PLACE.

TAKE-UP FOR BOOK-=SEWING MACHINES.

SPECIFICATION forming part of Letters Patent No. 358,572, dated March 1, 1887.

Application filed October 25, 1886. Serial No. 217,089. (No model.)

To all whom, it may concern:

Be it known that I, JOHN R. REYNOLDS, of Hartford, in the county of Hartford and State of Connecticut, have invented an Improvement in Machinery for Sewing Books, of which the following is a specification.

In my application, Serial N 0. 210,898, filed August 14., 1886, I have shown a range of semicircular needles acfiug in the same direction to pass into and out of the folded signature and perform the sewing, while the sheet is supported by an arm similar to that shown in Letters Patent No. 220,312. There are also loopers represented in my aforesaid applica tion for receiving the loops of needle-thread from the semicircular needles and for casting ofi" such loops over the respective needles when they emerge from the next signature, and in the said application loop-tightening devices or fingers are represented as supported by a bar and as being in between one signature and the next and acting to draw up the slack thread between the respectivestitches. 'With some kinds of thread the loops of thread passing over the loop-tightening fingers do not sepa' rate freely from the hooks at the ends of the loop-tighteners, and such loop-tighteners injure the thread and prevent the proper movement of the parts.

The object of my present invention is toinsure the delivery of the loops of thread from the hooks at the ends of the loop-tighteners, so that said loops will not catch a second time upon the loop-tighteners. \Vith this object in view I make use of a spring tongue at the hook of each loop-tightener. This tongue yields to the pressure against the thread when the looptighteners are moved to draw up the slack thread, so that the hooks catch in the thread and act in the manner described in my aforesaid application, and when the loop-tightcners are moved backwardly to liberate the loops of slack thread the springtongues close the hooks of the loop'tighteners'so that the loops cannot be caught a second time upon the hooks of the loop-tighteners.

In the drawings, Figure 1 represents a portion of the sewing mechanism with my looptighteners in place. Fig. 2 is a section, and Fig. 3 an edge View, of the loop-tightener in a magnified size. Fig. 4 is a side view of a modified form of the springtongue, and Fig. 5 is an edge view of the same.

The semicircular needles Z, their shafts k, and the bar D, supporting the same, corre spond to the devices shown in my aforesaid application. So, also, do the loopers a? and the bar b, carrying the same, and the bar 26, that is in front of the plate D, is moved up and down and laterally in the manner described in my said application, and upon this bar 26 the loop-tighteners 25 are attached, and they operate to hold back the signature after it has been sewed, and they are moved along and tighten the threads after the needles Z are passed into a fresh signature upon the sup porting-arm, and these loop tighteners Z are also lifted by the springs 28, acting upon the bar 26, as in said application; but I improve the loop-tighteners by applying to each a spring-tongue, 35, that yields to the pressure of the thread in drawing up the loop,- but as soon as the loop is drawn up and the bar 26 is forced downward by the arms 33 the spring tongue of each loop-tightener closes the book of each loop-tightener by springing forward into such hook and casting off the loop of thread or preventing it being caught a second time.

I usually make the loop-tighteners double, as seen in Figs. 2 and 8, so that the springtongue may occupy a central position between the two side plates of the loop-tightener; but the spring-tongue may be formed in two parts, of sheet metal, folded so as to be wrapped around the loop-tightener, as seen in Figs. 4 and 5, and it is pivoted at 40, the spring being separate, as shown at 41, the operation in either instance being the same.

I claim as my invention-- The combination, in a book-sewing machine, with the needles for performing the sewing, of loop-tighteners acting upon the thread be tween one stitch and the next and springtongues upon each loop-tightener acting to close the hooks of the tighteners after the loops have been thrown off, substantially as specified.

Signed by me this 15th day of October, A. D. 1886.

J N O. R. REYNOLDS. Witnesses:

W. B. MoGRAY, CHAS. E. PARKER. 

